I'm about to submit my first project wherein the client needed a 3D render of an Interior space. It's an Hourly project. How should I be proceding with this? Should I send a lower resolution (lower quality) preview to the client first and once my payment is released, I send the Final product? or does it work the other way around...?

You should not submit a lower-resolution file. You are working on an hourly contract. You submit all files all the time to the client. You do not wait for payment to be released.

The client does not "release payment."

The client does not do anything. The client's credit card is automatically billed.

You need to log time properly and understand that the work you are doing is going to be paid for automatically, and it does not belong to you. It belongs to the paying client. It is not your work to hold back or play games with.

Prashant, if it's an hourly job, you will be paid for however many hours you work on the project. This would, of course, include revisions, etc. Submit the work but if the client needs more work, do it!

Thanks a lot Preston for answering all the queries so patiently. I'm new to Upwork and getting along with the work culture here. And so, you might see more of me coming up with my questions here in the Community Regards.